The cdcat is a graphical (Qt based) multi-platform catalog program that scans the directories/drives you want and memorizes the filesystem (including the tags of MP3s) and stores it in a small file. The database is stored in a gzipped XML format, so you can hack it, or use it if necessary. Cdcat can store the contents of some specified files up to a size limit if you want (for example: *.nfo).

vvvP (Virtual Volumes View Photo Edition) catalogs photographs on removable devices and hard disks at the same time. Images can also be arranged in a single virtual filesystem. Each folder of this filesystem can contain images from many disks. The program allows you to view image thumbnails and full images.

HashCatalog is a program that can find duplicate files in one or more folders or between two lists of one or more folders. HashCatalog supports a regular expression mask to select files to be evaluated for duplicates. HashCatalog will always recurse directories in search of files. HashCatalog can also create an XML file containing a listing of files, along with enough information to be able to determine duplicates. This XML file can be used to allow searches for duplicates against removable media. The catalog can be supplied to the list of search locations, along with individual files and folders. The hash methods supported are: MD5, SHA, SHA1, SHA256, SHA384, and SHA512.

WordPress products catalog plugin allows you to create a cool catalog with your products. It has a lot of parameters which can be set, so you can easily change what you need. It allows you to search products with product names and categories.

Coin Catalog can be used to look up the value of a coin and/or to save your coin collection. It features a Belgian Coin Catalog (including Belgian Congo, Offical Medals, ECU-coins, Food-jetons, Austrain Netherlands), British Coin Catalog (including Maundy Money), Canadian Coin Catalog, Coins from the Netherlands, Search for a coin, Make your own Collections, Add pictures to your collection, Make a list of coins that you search or you want to exchange, Print your Collection, Show difference between Grades, Lookup Dealers, Lookup Clubs & meetings, Make use of Currency ($, £, €, and Y), Make use of the Gold Price, Update Catalogs online, and more.